Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01ER1301A/B/CC and 01ER1511D)
Helmholtz-Gemeinschaft
Leibniz-Gemeinschaft
Article History
Received: 3 April 2020
Accepted: 1 July 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: All procedures performed in the GNC were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the Ethics committee of the local chamber of physicians in Bremen (Bremen Medical Association, reference number RE/HR-388). Written informed consent was obtained from all participants included in the GNC.
: Not applicable.
: The authors declare that they have no competing interests.